Beata Deregowska

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In this paper we present a lower bound for the relative projection constant λ(V, X), where V is a hyperplane in X and X is a vector-valued sequence space c0({Xn}n∈N) or l1({Xn}n∈N). We give a characterization of one-complemented hyperplanes in c0({Xn}n∈N). We also consider projections of norm one in l1({Xn}n∈N). Moreover some applications of obtained(More)
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